weather.openportguide.de puts weatherforecasts into graphs.
The following visualizations are availabe:
- Weather tiles in mercator projection ready for overlay over "tiled web maps" or "slippy maps" like google maps or openstreetmap.
- Meteograms showing a 8 day forecast for any position on earth.
An example with temperatures tiles above OSM tiles:
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An example for a meteogram of London: